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BRITISH STANDARD

Adjustable speed
electrical power drive
systems —
Part 5-1: Safety requirements —
Electrical, thermal and energy

The European Standard EN 61800-5-1:2007 has the status of a
British Standard

ICS 29.130.01; 29.200

12&23<,1*:,7+287%6,3(50,66,21(;&(37$63(50,77('%<&23<5,*+7/$:

BS EN
61800-5-1:2007


BS EN 61800-5-1:2007

National foreword

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This British Standard is the UK implementation of EN 61800-5-1:2007. It is
identical to IEC 61800-5-1:2007. It supersedes BS EN 61800-5-1:2003, which
will be withdrawn on 1 August 2010.
The UK participation in its preparation was entrusted to Technical Committee

PEL/22, Power electronics.
A list of organizations represented on this committee can be obtained on
request to its secretary.
This publication does not purport to include all the necessary provisions of a
contract. Users are responsible for its correct application.
Compliance with a British Standard cannot confer immunity from
legal obligations.

This British Standard was
published under the authority
of the Standards Policy and
Strategy Committee
on 31 October 2007

© BSI 2007

ISBN 978 0 580 55790 3

Amendments issued since publication
Amd. No.

Date

Comments


EUROPEAN STANDARD

EN 61800-5-1


NORME EUROPÉENNE
September 2007

EUROPÄISCHE NORM

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ICS 29.130

Supersedes EN 61800-5-1:2003

English version

Adjustable speed electrical power drive systems Part 5-1: Safety requirements Electrical, thermal and energy
(IEC 61800-5-1:2007)
Entrnements électriques de puissance
à vitesse variable Partie 5-1: Exigences de sécurité Electrique, thermique et énergétique
(CEI 61800-5-1:2007)

Elektrische Leistungsantriebssysteme
mit einstellbarer Drehzahl Teil 5-1: Anforderungen
an die Sicherheit Elektrische, thermische
und energetische Anforderungen
(IEC 61800-5-1:2007)

This European Standard was approved by CENELEC on 2007-08-01. CENELEC members are bound to comply
with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard
the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the Central Secretariat or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CENELEC member into its own language and notified
to the Central Secretariat has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the
Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: rue de Stassart 35, B - 1050 Brussels
© 2007 CENELEC -

All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61800-5-1:2007 E


EN 61800-5-1:2007

–2–

Foreword

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The text of document 22G/178/FDIS, future edition 2 of IEC 61800-5-1, prepared by SC 22G, Adjustable
speed electric drive systems incorporating semiconductor power converters, of IEC TC 22, Power
electronic systems and equipment, was submitted to the IEC-CENELEC parallel vote and was approved

by CENELEC as EN 61800-5-1 on 2007-08-01.
This European Standard supersedes EN 61800-5-1:2003.
The major areas of change in EN 61800-5-1:2007 are the following:
– addition of alphabetical Table 1 in Clause 3;
– addition of Table 2 in 4.1 for relevance to PDS/CDM/BDM;
– addition of Table 4 summary of decisive voltage class requirements;
– expansion of subclause on protective bonding (4.3.5.3);
– clarification of distinction between touch current and protective conductor current;
– revision of section on insulation (now 4.3.6) to include solid insulation;
– addition of overvoltage categories I and II to HV insulation voltage;
– revision of section on Solid insulation (now 4.3.6.8);
– addition of high-frequency insulation requirements (4.3.6.9, Annex E);
– addition of requirements for liquid-cooled PDS (4.4.5);
– addition of climatic and vibration tests (5.2.6);
– clarification of voltage test procedure to avoid over-stress of basic insulation (5.2.3.2.3);
– revision of short-circuit test requirement for large, high-voltage and one-off PDS (now 5.2.3.6);
– addition of informative Annex B for overvoltage category reduction.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement

(dop)

2008-05-01

– latest date by which the national standards conflicting
with the EN have to be withdrawn

(dow)


2010-08-01

Annex ZA has been added by CENELEC.
__________

Endorsement notice
The text of the International Standard IEC 61800-5-1:2007 was approved by CENELEC as a European
Standard without any modification.
__________


–3–

EN 61800-5-1:2007

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CONTENTS
1

Scope ...............................................................................................................................6

2

Normative references........................................................................................................6

3

Terms and definitions ..................................................................................................... ..9


4

Protection against electric shock, thermal, and energy hazards ....................................... 15

5

4.1
4.2
4.3
4.4
4.5
4.6
Test

6

5.1 General ................................................................................................................. 56
5.2 Test specifications ................................................................................................. 59
Information and marking requirements ............................................................................ 81
6.1
6.2
6.3
6.4
6.5

General ................................................................................................................. 15
Fault conditions ..................................................................................................... 16
Protection against electric shock ............................................................................ 17
Protection against thermal hazards ........................................................................ 50

Protection against energy hazards ......................................................................... 55
Protection against environmental stresses ............................................................. 56
requirements........................................................................................................... 56

General ................................................................................................................. 81
Information for selection ........................................................................................ 84
Information for installation and commissioning ....................................................... 84
Information for use ................................................................................................ 88
Information for maintenance .................................................................................. 90

ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ

Annex A (informative) Examples of protection in case of direct contact ................................. 92
Annex B (informative) Examples of overvoltage category reduction ....................................... 94

Annex C (normative) Measurement of clearance and creepage distances ........................... 100
Annex D (informative) Altitude correction for clearances ..................................................... 106
Annex E (informative) Clearance and creepage distance determination for frequencies
greater than 30 kHz............................................................................................................. 108
Annex F (informative) Cross-sections of round conductors.................................................. 111
Annex G (informative) Guidelines for RCD compatibility...................................................... 112
Annex H (informative) Symbols referred to in this part of IEC 61800 ................................... 115
Annex ZA (normative) Normative references to international publications with their
corresponding European publications..................................................................................................118
Bibliography ........................................................................................................................ 116
Figure 1 – PDS hardware configuration within an installation.................................................. 15
Figure 2 – Typical waveform for a.c. working voltage ............................................................. 18
Figure 3 – Typical waveform for d.c. working voltage ............................................................. 19
Figure 4 – Typical waveform for pulsating working voltage ..................................................... 19
Figure 5 – Examples for protection against direct contact ...................................................... 21

Figure 6 – Example of protective bonding .............................................................................. 25
Figure 7 – Voltage limits under fault conditions ...................................................................... 27
Figure 8 – Voltage test procedures ........................................................................................ 67
Figure 9 – Circuit for high-current arcing test ......................................................................... 76


EN 61800-5-1:2007

–4–

Figure 10 – Test fixture for hot-wire ignition test .................................................................... 77
Figure A.1 – Protection by DVC A, with protective separation................................................ 92
Figure A.2 – Protection by means of protective impedance .................................................... 93

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Figure A.3 – Protection by using limited voltages ................................................................... 93
Figure B.1 – Basic insulation evaluation for circuits connected directly to the origin of
the installation supply mains.................................................................................................. 94
Figure B.2 – Basic insulation evaluation for circuits connected directly to the supply
mains.................................................................................................................................... 95
Figure B.3 – Basic insulation evaluation for equipment not permanently connected to the
supply mains ......................................................................................................................... 95
Figure B.4 – Basic insulation evaluation for circuits connected directly to the origin of
the installation supply mains where internal SPDs are used ................................................... 95
Figure B.5 - Basic insulation evaluation for circuits connected directly to the supply
mains where internal SPDs are used ..................................................................................... 96
Figure B.6 – Example of protective separation evaluation for circuits connected directly
to the supply mains where internal SPDs are used................................................................. 96
Figure B.7 – Example of protective separation evaluation for circuits connected directly

to the supply mains where internal SPDs are used................................................................. 96
Figure B.8 Example of protective separation evaluation for circuits connected directly to
the supply mains where internal SPDs are used..................................................................... 97
Figure B.9 – Basic insulation evaluation for circuits not connected directly to the supply
mains.................................................................................................................................... 97

ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ

Figure B.10 – Basic insulation evaluation for circuits not connected directly to the supply
mains.................................................................................................................................... 97
Figure B.11 – Functional insulation evaluation within circuits affected by external
transients .............................................................................................................................. 98
Figure B.12 – Basic insulation evaluation for circuits both connected and not connected
directly to the supply mains ................................................................................................... 98

Figure B.13 – Insulation evaluation for accessible circuit of DVC A ...................................... ..99
Figure G.1 – Flow chart leading to selection of the RCD/RCM type upstream of a PDS ........ 112
Figure G.2 – Fault current waveforms in connections with semiconductor devices................ 113
Table 1 – Alphabetical list of terms ........................................................................................ ..9
Table 2 – Relevance of requirements to PDS/CDM/BDM........................................................ 16
Table 3 – Summary of the limits of the decisive voltage classes............................................. 17
Table 4 – Protection requirements for considered circuit ........................................................ 18
Table 5 – Protective earthing conductor cross-section ........................................................... 27
Table 6 – Definitions of pollution degrees .............................................................................. 30
Table 7 – Insulation voltage for low voltage circuits................................................................ 32
Table 8 – Insulation voltage for high voltage circuits .............................................................. 32
Table 9 – Clearance distances .............................................................................................. 36
Table 10 – Creepage distances (mm) .................................................................................... 38
Table 11 – Thickness of sheet metal for enclosures: carbon steel or stainless steel .............. 44
Table 12 – Thickness of sheet metal for enclosures: aluminium, copper or brass .................. 45

Table 13 – Wire bending space from terminals to enclosure .................................................. 48
Table 14 – Generic materials for the direct support of uninsulated live parts .......................... 51
Table 15 – Maximum measured temperatures for internal materials and components............. 53


–5–

EN 61800-5-1:2007

Table 16 – Maximum measured temperatures for external parts of the CDM .......................... 54
Table 17 – Test overview ...................................................................................................... 58
Table 18 – Impulse voltage test ............................................................................................. 62

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Table 19 – Impulse test voltage for low-voltage PDS ............................................................. 63
Table 20 – Impulse test voltage for high-voltage PDS ............................................................ 63
Table 21 – A.C. or d.c. test voltage for circuits connected directly to low voltage mains .......... 64
Table 22 – A.C. or d.c. test voltage for circuits connected directly to high voltage mains ........ 65
Table 23 – A.C. or d.c. test voltage for circuits not connected directly to the mains ................ 66
Table 24 – Partial discharge test ........................................................................................... 69
Table 25 – Dry heat test (steady state) .................................................................................. 79
Table 26 – Damp heat test (steady state) .............................................................................. 80
Table 27 – Vibration test ....................................................................................................... 81
Table 28 – Information requirements ..................................................................................... 83
Table C.1 – Width of grooves by pollution degree ................................................................ 100
Table D.1 – Correction factor for clearances at altitudes between 2 000 m and 20 000 m
(see 4.3.6.4.1) .................................................................................................................... 106
Table D.2 – Test voltages for verifying clearances at different altitudes................................ 107
Table E.1 – Minimum values of clearances in air at atmospheric pressure for

inhomogeneous field conditions (Table 1 of IEC 60664-4) .................................................... 109
Table E.2 – Minimum values of creepage distances for different frequency ranges
(Table 2 of IEC 60664-4) ..................................................................................................... 110

ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ

Table F.1 – Standard cross-sections of round conductors .................................................... 111
Table H.1 – Symbols used................................................................................................... 115


EN 61800-5-1:2007

–6–

ADJUSTABLE SPEED ELECTRICAL POWER DRIVE SYSTEMS –

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Part 5-1: Safety requirements –
Electrical, thermal and energy

1

Scope

This part of IEC 61800 specifies requirements for adjustable speed power drive systems, or
their elements, with respect to electrical, thermal and energy safety considerations. It does not
cover the driven equipment except for interface requirements. It applies to adjustable speed
electric drive systems which include the power conversion, drive control, and motor or motors.
Excluded are traction and electric vehicle drives. It applies to d.c. drive systems connected to

line voltages up to 1 kV a.c., 50 Hz or 60 Hz and a.c. drive systems with converter input
voltages up to 35 kV, 50 Hz or 60 Hz and output voltages up to 35 kV.
Other parts of IEC 61800 cover rating specifications, EMC, functional safety, etc.
The scope of this part of IEC 61800 does not include devices used as component parts of a
PDS if they comply with the safety requirements of a relevant product standard for the same
environment. For example, motors used in PDS shall comply with the relevant parts of
IEC 60034.

ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ

Unless specifically stated, the requirements of this International Standard apply to all parts of
the PDS, including the CDM/BDM (see Figure 1).

NOTE In some cases, safety requirements of the PDS (for example, protection against direct contact) can
necessitate the use of special components and/or additional measures.

2

Normative references

The following referenced documents are indispensable for the application of this document. For
dated references, only the edition cited applies. For undated references, the latest edition of
the referenced document (including any amendments) applies.
NOTE This does not mean that compliance is required with all clauses of the referenced documents, but rather
that this international standard makes a reference that cannot be understood in the absence of the referenced
document.

IEC 60034 (all parts), Rotating electrical machines
IEC 60034-1, Rotating electrical machines – Part 1: Rating and performance
IEC 60034-5, Rotating electrical machines – Part 5: Degrees of protection provided by the

integral design of rotating electrical machines (IP code) - Classification
IEC 60050-111, International Electrotechnical Vocabulary (IEV) – Chapter 111: Physics and
chemistry


EN 61800-5-1:2007

–7–

IEC 60050-151, International Electrotechnical Vocabulary (IEV) – Part 151: Electrical and
magnetic devices

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IEC 60050-161, International
Electromagnetic compatibility

Electrotechnical

Vocabulary

(IEV)

–

Chapter

161:

IEC 60050-191, International Electrotechnical Vocabulary (IEV) – Chapter 191: Dependability

and quality of service
IEC 60050-441, International Electrotechnical Vocabulary (IEV) – Chapter 441: Switchgear,
controlgear and fuses
IEC 60050-442, International Electrotechnical Vocabulary (IEV) – Part 442: Electrical
accessories
IEC 60050-551, International Electrotechnical Vocabulary (IEV) – Part 551: Power electronics
IEC 60050-601, International Electrotechnical Vocabulary (IEV) – Chapter 601: Generation,
transmission and distribution of electricity – General
IEC 60060-1:1989, High-voltage test techniques – Part 1: General definitions and test
requirements
IEC 60068-2-2:1974, Environmental testing – Part 2: Tests. Tests B: Dry heat

ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ

IEC 60068-2-6, Environmental testing – Part 2: Tests – Test Fc: Vibration (sinusoidal)

IEC 60068-2-78, Environmental testing – Part 78: Tests – Test Cab: Damp heat, steady state

IEC 60112:2003, Method for the determination of the proof and the comparative tracking
indices of solid insulating materials
IEC 60204-11, Safety of machinery – Electrical equipment of machines – Part 11:
Requirements for HV equipment for voltages above 1 000 V a.c. or 1 500 V d.c. and not
exceeding 36 kV
IEC 60309, Plugs, socket-outlets and couplers for industrial purposes
IEC 60364-1, Low-voltage electrical installations – Part 1: Fundamental principles, assessment
of general characteristics, definitions
IEC 60364-5-54:2002, Electrical installations of buildings – Part 5-54: Selection and erection of
electrical equipment – Earthing arrangements, protective conductors and protective bonding
conductors
IEC 60417, Graphical symbols for use on equipment

IEC 60529:1989, Degrees of protection provided by enclosures (IP code)
IEC 60617, Graphical symbols for diagrams


EN 61800-5-1:2007

–8–

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IEC 60664-1:1992, Insulation coordination for equipment within low-voltage systems – Part 1:
Principles, requirements and tests 1)
Amendment 1 (2000)
Amendment 2 (2002)
IEC 60664-3:2003, Insulation coordination for equipment within low-voltage systems – Part 3:
Use of coatings to achieve insulation coordination of printed board assemblies
IEC 60664-4:2005, Insulation coordination for equipment within low-voltage systems – Part 4:
Consideration of high-frequency voltage stress
IEC 60695-2-10, Fire hazard testing – Part 2-10: Glowing/hot-wire based test methods – Glowwire apparatus and common test procedure
IEC 60695-2-13, Fire hazard testing – Part 2-13: Glowing/hot-wire based test methods – Glowwire ignitability test method for materials
IEC 60695-11-10, Fire hazard testing – Part 11-10: Test flames – 50 W horizontal and vertical
flame test methods
IEC 60695-11-20, Fire hazard testing – Part 11-20: Test flames – 500 W flame test methods
IEC 60755, General requirements for residual current operated protective devices
IEC 60947-7-1:2002, Low-voltage switchgear and control gear – Part 7-1: Ancillary equipment
–Terminal blocks for copper conductors

ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ

IEC 60947-7-2:2002, Low-voltage switchgear and controlgear – Part 7-2: Ancillary equipment –

Protective conductor terminal blocks for copper conductors
IEC 60990:1999, Methods of measurement of touch current and protective conductor current
IEC 61230, Live working – Portable equipment for earthing or earthing and short-circuiting

IEC 61800-1, Adjustable speed electrical power drive systems – Part 1: General requirements
– Rating specifications for low voltage adjustable speed d.c. power drive systems
IEC 61800-2, Adjustable speed electrical power drive systems – Part 2: General requirements
– Rating specifications for low voltage adjustable frequency a.c. power drive systems
IEC 61800-4, Adjustable speed electrical power drive systems – Part 4: General requirements
– Rating specifications for a.c. power drive systems above 1 000 V a.c. and not exceeding
35 kV
IEC 62020, Electrical accessories – Residual current monitors for household and similar uses
(RCMs)

___________
1 There exists a consolidated edition 1.2 (2002) including IEC 60664-1:1992 and its Amendments 1 and 2.


EN 61800-5-1:2007

–9–

IEC 62271-102, High-voltage switchgear and controlgear – Part 102: Alternating current
disconnectors and earthing switches

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ISO 3864 (all parts), Graphical symbols – Safety colours and safety signs
ISO 7000:2004, Graphical symbols for use on equipment – Index and synopsis


3

Terms and definitions

For the purposes of this international standard, the terms and definitions given in
IEC 60050-111, IEC 60050-151, IEC 60050-161, IEC 60050-191, IEC 60050-441,
IEC 60050-442, IEC 60050-551, IEC 60050-601, IEC 60664-1, IEC 61800-1, IEC 61800-2,
IEC 61800-3 and IEC 61800-4 (some of which are repeated below for convenience), and the
following definitions apply.
Table 1 provides an alphabetical cross-reference listing of terms.
Table 1 – Alphabetical list of terms
Term

Term
number

Term

Term
number

Term

Term
number

adjacent circuit

3.1


(earth) leakage current

3.16

protective screening

3.31

basic drive module
(BDM)

3.2

live part

3.17

protective separation

3.32

basic insulation

3.3

low-voltage PDS

3.18

reinforced insulation


3.33

CDM (complete drive
module )

3.4

open-type (product)

3.19

routine test

3.34

closed electrical
operating area

3.5

power drive system
(PDS)

3.20

safety ELV (SELV)
circuit

3.35


commissioning test

3.6

protective ELV (PELV)
circuit

3.21

sample test

3.36

decisive voltage class
(DVC)

3.7

prospective short-circuit
current

3.22

supplementary insulation

3.37

double insulation


3.8

protective bonding

3.23

system voltage

3.38

extra low voltage (ELV)

3.9

protective class 0

3.24

temporary overvoltage

3.39

electrical breakdown

3.10

protective class I

3.25


touch current

3.40

expected lifetime

3.11

protective class II

3.26

type test

3.41

functional insulation

3.12

protective class III

3.27

user terminal

3.42

high-voltage PDS


3.13

protective earthing (PE)

3.28

working voltage

3.43

installation

3.14

protective earthing
conductor

3.29

zone of equipotential
bonding

3.44

integrated PDS

3.15

protective impedance


3.30

ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ

3.1
adjacent circuit
circuit having no galvanic connection to the circuit under consideration
NOTE

A protective impedance is not considered to be a galvanic connection.


EN 61800-5-1:2007

– 10 –

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3.2
basic drive module (BDM)
drive module, consisting of a converter section and a control section for speed, torque, current
or voltage, etc. (see Figure 1)
3.3
basic insulation
insulation applied to live parts to provide basic protection against electrical shock
[IEV 826-12-14, modified]
3.4
complete drive module
CDM
drive system, without the motor and the sensors which are mechanically coupled to the motor

shaft, consisting of, but not limited to, the BDM, and extensions such as feeding section and
auxiliaries (see Figure 1)
3.5
closed electrical operating area
room or location for electrical equipment to which access is restricted to skilled or instructed
persons by the opening of a door or the removal of a barrier by the use of a key or tool and
which is clearly marked by appropriate warning signs
3.6
commissioning test
test on a device or equipment performed on site, to prove the correctness of installation and
operation
[IEV 151-16-24, modified]

ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ

3.7
decisive voltage class
DVC
classification of voltage range used to determine the protective measures against electric
shock
3.8
double insulation
insulation comprising both basic insulation and supplementary insulation
[IEV 826-12-16]
NOTE

Basic and supplementary insulation are separate, each designed for basic protection against electric shock.

3.9
extra low voltage

ELV
any voltage not exceeding 50 V a.c. r.m.s. and 120 V d.c.
NOTE 1

R.M.S. ripple voltage of not more than 10 % of the d.c. component.

NOTE 2 In this international standard, protection against electric shock is dependent on the decisive voltage
classification. DVC A and B are contained in the voltage range of ELV.


– 11 –

EN 61800-5-1:2007

3.10
electrical breakdown
failure of insulation under electric stress when the discharge completely bridges the insulation,
thus reducing the voltage between the electrodes almost to zero

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[IEC 60664-1:1992, definition 1.3.20]
3.11
expected lifetime
minimum duration for which the safety performance characteristics are valid at rated conditions
of operation
3.12
functional insulation
insulation between conductive parts within a circuit, which is necessary for the proper
functioning of the circuit, but which does not provide protection against electric shock

3.13
high-voltage PDS
product with rated supply voltage between 1 kV and 35 kV a.c., 50 Hz or 60 Hz
NOTE

These products fall into the scope of IEC 61800-4

3.14
installation
equipment or equipments including at least the PDS and the driven equipment (see
Figure 1)

ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ

NOTE The word “installation” is also used in this international standard to denote the process of installing a
PDS/CDM/BDM. In these cases, the word does not appear in italics.

3.15
integrated PDS
PDS where motor and CDM/BDM are mechanically integrated into a single unit
3.16
(earth) leakage current
current flowing from the live parts of the installation to earth, in the absence of an insulation
fault
[IEV 442-01-24]
3.17
live part
conductor or conductive part intended to be energized in normal use, including a neutral
conductor but not a protective earth neutral
3.18

low-voltage PDS
product with rated supply voltage up to 1 000 V a.c., 50 Hz or 60 Hz
NOTE

These products fall into the scope of IEC 61800-1 or IEC 61800-2.

3.19
open type (product)
(product) intended for incorporation within enclosure or assembly which will provide access
protection


EN 61800-5-1:2007

– 12 –

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3.20
power drive system
PDS
system for the speed control of an electric motor, including the CDM and motor but not the driven
equipment (see Figure 1)
3.21
protective ELV (PELV) circuit
electrical circuit with the following characteristics:
•

the voltage does not continuously exceed ELV under single fault as well as normal
conditions;


•

protective separation from circuits other than PELV or SELV;

•

provisions for earthing of the PELV circuit, or its accessible conductive parts, or both

3.22
prospective short-circuit current
current which flows when the supply conductors to the circuit are short-circuited by a conductor
of negligible impedance located as near as possible to the supply terminals of the
PDS/CDM/BDM
3.23
protective bonding
electrical connection of conductive parts for safety purposes
3.24
protective class 0
equipment in which protection against electric shock relies only upon basic insulation
NOTE

ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ

Equipment of this class becomes hazardous in the event of a failure of the basic insulation.

3.25
protective class I
equipment in which protection against electric shock does not rely on basic insulation only, but
which includes an additional safety precaution in such a way that means are provided for the

connection of accessible conductive parts to the protective (earthing) conductor in the fixed
wiring of the installation, so that accessible conductive parts cannot become live in the event of
a failure of the basic insulation
3.26
protective class II
equipment in which protection against electric shock does not rely on basic insulation only, but
in which additional safety precautions such as supplementary insulation or reinforced insulation
are provided, there being no provision for protective earthing or reliance upon installation
conditions
3.27
protective class III
equipment in which protection against electric shock relies on supply at ELV and in which
voltages higher than those of ELV are not generated and there is no provision for protective
earthing
[see IEC 61140, subclause 7.4]


– 13 –

EN 61800-5-1:2007

Licensed Copy: AUB User, na, Tue Oct 23 06:47:10 GMT+00:00 2007, Uncontrolled Copy, (c) BSI

3.28
protective earthing (PE)
earthing of a point in a system, or equipment, for protection against electric shock in case of a
fault
3.29
protective earthing conductor
protective conductor provided for protective earthing

[IEV 195-02-11]
3.30
protective impedance
impedance connected between live parts and accessible conductive parts, of such value that
the current, in normal use and under likely fault conditions, is limited to a safe value, and which
is so constructed that its reliability is maintained throughout the life of the equipment
[IEV 442-04-24, modified]
3.31
protective screening
separation of circuits from hazardous live-parts by means of an interposed conductive screen,
connected to the means of connection for a protective earthing conductor
3.32
protective separation
separation between circuits by means of basic and supplementary protection (basic insulation
plus supplementary insulation or protective screening) or by an equivalent protective provision
(for example, reinforced insulation)

ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ

3.33
reinforced insulation
single insulation system, applied to live parts, which provides a degree of protection against
electric shock equivalent to double insulation under the conditions specified in the relevant
IEC standard
[IEC 60664-1: 1992, definition 1.3.17.5]
3.34
routine test
test to which each individual device is subjected during or after manufacture to ascertain
whether it complies with certain criteria
[IEV 151-16-17]

3.35
Safety ELV (SELV) circuit
electrical circuit with the following characteristics:
•

the voltage does not exceed ELV;

•

protective separation from circuits other than SELV or PELV;

•

no provisions for earthing of the SELV circuit, or its accessible conductive parts;

•

basic insulation of the SELV circuit from earth and from PELV circuits

3.36
sample test
test on a number of devices taken at random from a batch
[IEV 151-16-20, modified]


EN 61800-5-1:2007

– 14 –

3.37

supplementary insulation
independent insulation applied in addition to basic insulation in order to provide protection
against electric shock in the event of a failure of basic insulation

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[IEC 60664-1: 1992, definition 1.3.17.3]
NOTE

Basic and supplementary insulation are separate, each designed for basic protection against electric shock.

3.38
system voltage
voltage used to determine insulation requirements
NOTE

See 4.3.6.2.1 for further consideration of system voltage.

3.39
temporary overvoltage
overvoltage at the supply frequency of relatively long duration
[IEC 60664-1:1992, definition 1.3.7.1, modified]
3.40
touch current
electric current passing through a human body or through an animal body when it touches one
or more accessible parts of an electrical installation or electrical equipment
[IEV 826-11-12]

ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ


3.41
type test
test of one or more devices made to a certain design to show that the design meets certain
specifications
[IEV 151-16-16, modified]
3.42
user terminal
terminal provided for external connection to the PDS/CDM/BDM

3.43
working voltage
voltage, at rated supply conditions (without tolerances) and worst case operating conditions,
which occurs by design in a circuit or across insulation
NOTE

The working voltage can be d.c. or a.c. Both the r.m.s. and recurring peak values are used.

3.44
zone of equipotential bonding
zone where all simultaneously accessible conductive parts are electrically connected to prevent
hazardous voltages appearing between them
NOTE

For equipotential bonding, it is not necessary for the parts to be earthed.


– 15 –

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Installation or

EN 61800-5-1:2007

part of installation

PDS (power drive system)
CDM (complete drive module)
System control and sequencing

BDM (basic drive module)
Converter section
Control section

Feeding section
Auxiliaries
Others

ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ

Motor and sensors

Driven equipment
IEC 1197/07

Figure 1 – PDS hardware configuration within an installation

4
4.1


Protection against electric shock, thermal, and energy hazards
General

This Clause 4 defines the minimum requirements for the design and construction of a PDS, to
ensure its safety during installation, normal operating conditions and maintenance for the
expected lifetime of the PDS. Consideration is also given to minimising hazards resulting from
reasonably foreseeable misuse.
Table 2 shows the application of the requirements of this Clause 4 to PDS, CDM or BDM.


EN 61800-5-1:2007

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Table 2 – Relevance of requirements to PDS/CDM/BDM

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Subclause

Title

PDS

a

CDM/B
DM

4.2


(Protection against electric shock, thermal, and energy hazards) - Fault conditions

A

A

4.3.1

Decisive voltage classification

A

A

4.3.2

Protective separation

A

A

4.3.3

Protection against direct contact

A

C


4.3.4

Protection in case of direct contact

A

C

4.3.5.1

(Protection against indirect contact) - General

A

A

4.3.5.2

Insulation between live parts and accessible conductive parts

A

C

4.3.5.3

4.1.1.1

A


C

4.3.5.4

Protective earthing conductor

A

A

4.3.5.5

Means of connection for the protective earthing conductor

A

A

4.3.5.6

Special features in equipment for protective class II

A

C

4.3.6

Insulation


A

A

4.3.7

Enclosures

A

C

4.3.8

Wiring and connections

A

A

4.3.9

Output short-circuit requirements

A

A

4.3.10


Residual current-operated protective (RCD) or monitoring (RCM) device compatibility

A

C

4.3.11

Capacitor discharge

A

A

4.3.12

Access conditions for high-voltage PDS

A

C

4.4

Protection against thermal hazards

A

A


4.4.3

Flammability of enclosure materials

A

C

4.4.5

Specific requirements for liquid cooled PDS

A

A

4.5

Protection against energy hazards

A

A

4.5.2

Mechanical energy hazards

A


C

4.6

Protection against environmental stresses

A

A

Protective bonding circuit

ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ

A

Requirement always relevant.

C

Requirement relevant unless CDM or BDM is incorporated into an assembly that provides the required protection.

a

Integrated PDS shall meet the requirement for PDS.

4.2

Fault conditions


PDS shall be designed to avoid operating modes or sequences that can cause a fault condition
or component failure leading to a hazard, unless other measures to prevent the hazard are
provided by the installation.


EN 61800-5-1:2007

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Protection against thermal hazards and electric shock shall be maintained in single fault
conditions as well as under normal conditions.
Circuit analysis shall be performed to identify components (including insulation systems) whose
failure would result in a thermal or electric shock hazard. The analysis shall include the effect
of short-circuit and open-circuit conditions of the component. The analysis need not include
power semiconductor devices if equivalent testing is accomplished during short-circuit tests, or
components which have been determined to have an insignificant probability of failure during
the expected lifetime of the PDS. See 5.2.3.6.4 for test.
NOTE It is possible that no critical components will be revealed by the analysis. In this case, no component failure
testing is required.

Consideration shall be given to potential safety hazards associated with major component parts
of the PDS, such as motor rotating parts and flammability of transformer and capacitor oils.
4.3

Protection against electric shock

4.3.1


Decisive voltage classification

4.3.1.1 Use of decisive voltage class (DVC)
Protective measures against electric shock depend on the decisive voltage classification of the
circuit according to Table 3, which correlates the limits of the working voltage within the circuit
with the DVC. The DVC in turn determines the minimum required level of protection for the
circuit.

ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ

4.3.1.2 Limits of DVC

Table 3 – Summary of the limits of the decisive voltage classes
Limits of working voltage
(V)
DVC

A
B

a

a.c. voltage
(r.m.s.)

a.c. voltage (peak)

U ACL


U ACPL

25

35,4

50

71

C

1 000

4 500

D

> 1 000

> 4 500

b

d.c. voltage
(mean)

Subclause

U DCL

60

4.3.4.2, 4.3.4.4

120

4.3.5.3.1 a), b)

1 500
> 1 500

a

For equipment having only one DVC A circuit, the r.m.s. and peak voltage limits are 30 V and 42,4 V
respectively.

b

The value of 4 500 V allows all low-voltage PDS to be covered by Table 7 (possible reflections up to
3 × √2 × 1 000 V = 4 242 V).

4.3.1.3 Requirements for protection
Table 4 shows the requirements for the application of basic insulation or protective separation,
dependent on the DVC of the circuit under consideration and of adjacent circuits.


EN 61800-5-1:2007

– 18 –


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Table 4 – Protection requirements for considered circuit
DVC of
considered
circuit

Protection
required
against direct
contact

Insulation to
earthed parts

Insulation to
accessible
conductive
parts that are
not earthed

A

No

a*

a

B


Yes

b

p

C

Yes

b

p

D

Yes

b

p

Insulation to adjacent circuit
of DVC:
A

B

C


D

f*

b

p‡

p

b

p‡

p

b

p
b

a

Insulation is not necessary for safety, but may be required for functional reasons.

*

If the considered circuit is designated as a SELV circuit, basic insulation is required from earth and from PELV
circuits.


f

Functional insulation for circuit of higher voltage.

b

Basic insulation for circuit of higher voltage.

p

Protective separation for circuit of higher voltage.

‡

It is permitted to use basic insulation for the circuit of higher voltage if protection against direct contact is
applied to the considered circuit by basic or supplementary insulation for the circuit of higher voltage.

4.3.1.4 Circuit evaluation
4.3.1.4.1 General

ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ

The DVC of a given circuit is evaluated by the method set out below, three cases of waveforms
being considered.
4.3.1.4.2 A.C. working voltage (see Figure 2)

UACP
UAC


IEC 258/03

Key
U AC r.m.s. voltage
U ACP recurring peak voltage

Figure 2 – Typical waveform for a.c. working voltage
The working voltage has an r.m.s. value U AC and a recurring peak value U ACP .
The DVC is that of the lowest voltage row of Table 3 for which both of the following conditions
are satisfied.
•

U AC ≤ U ACL

•

U ACP ≤ U ACPL


EN 61800-5-1:2007

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4.3.1.4.3 D.C. working voltage (see Figure 3)

UDCP

UDC


IEC 259/03

Key
U DC mean voltage
U DCP recurring peak voltage

Figure 3 – Typical waveform for d.c. working voltage
The working voltage has a mean value U DC and a recurring peak value U DCP , caused by a
ripple voltage of r.m.s. value not greater than 10 % of U DC .
The DVC is that of the lowest voltage row of Table 3 for which both of the following conditions
are satisfied.
ã

U DC U DCL

ã

U DCP 1,17 ì U DCL

ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ

4.3.1.4.4 Pulsating working voltage (see Figure 4)

UAC
UACP
UDC

IEC 260/03


Key
U DC mean voltage
U DCP recurring peak voltage

Figure 4 – Typical waveform for pulsating working voltage
The working voltage has a mean value U DC and a recurring peak value U ACP , caused by a
ripple voltage of r.m.s. value U AC greater than 10 % of U DC .
The DVC is that of the lowest voltage row of Table 3 for which both of the following conditions
are satisfied.
•

U AC /U ACL + U DC /U DCL ≤ 1

•

U ACP /U ACPL + U DC /(1,17 × U DCL ) ≤ 1


EN 61800-5-1:2007

4.3.2

– 20 –

Protective separation

Protective separation shall be achieved by application of materials resistant to degradation, as
well as by special constructive measures; and

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•

by double or reinforced insulation,
or

•

by protective screening, i.e. by a conductive screen connected to earth by protective
bonding of the PDS, or connected to the protective earth conductor itself, whereby the
screen is separated from live parts by at least basic insulation,
or

•

by protective impedance according to 4.3.4.3 comprising limitation of discharge energy and
of current, or by limitation of voltage according to 4.3.4.4.

The protective separation shall be fully and effectively maintained under all conditions of
intended use of the PDS.
4.3.3

Protection against direct contact

4.3.3.1 General
Protection against direct contact is employed to prevent persons from touching live parts which
do not meet the requirements of 4.3.4. It shall be provided by one or more of the measures
given in 4.3.3.2 and 4.3.3.3.
For integrated PDS the motor shall meet the requirements of IEC 60034-5. For the BDM the
protection shall be provided by one or more of the measures given in 4.3.3.2 and 4.3.3.3.


ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ

4.3.3.2 Protection by means of insulation of live parts

Live parts shall be completely surrounded with insulation if their working voltage is greater than
the maximum limit of DVC A or if they do not have protective separation from adjacent circuits
of DVC C or D. The insulation shall be rated according to the impulse voltage, temporary
overvoltage or working voltage (see 4.3.6.2.1), whichever gives the most severe requirement. It
shall not be possible to remove the insulation without the use of a tool.
Any conductive part which is not separated from the live parts by at least basic insulation is
considered to be a live part. A metallic accessible part is considered to be conductive if its
surface is bare or is covered by an insulating layer which does not comply with the
requirements of basic insulation.
As an alternative to solid or liquid insulation, a clearance according to 4.3.6.4, shown by L 1 and
L 2 in Figure 5, may be provided.
The grade of insulation – basic, double or reinforced – depends on:
•

the DVC of the live parts or adjacent circuits,
and

•

the connection of conductive parts to earth by protective bonding.

Examples of insulation configurations are given in Figure 5, which also shows the requirements
for apertures.



EN 61800-5-1:2007

– 21 –

Insulation configuration

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Type of insulation

1)

a

b

c

Accessible parts
conductive and
connected to earth
by
protective bonding

Accessible parts
not conductive

Accessible parts conductive, but
NOT connected to earth by
protective bonding


Solid or liquid

D

D

S

A B Z

A B M

A R

ABM Z

A

R

A

R

M

A B Z M
I


I

M
*

S
2) Totally or
partially by air
clearance

A Z

S
A

A

M

A

Z

L1

M Z

L1

L1


A

C BC A B M

C BC A ZC

4) Requirements
for apertures in
enclosures

I

I
A

M
L2

Z M

*

I

ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ

S
I


C BC A ZC M

S

Circuit A: lower
voltage circuit
Circuit C: higher
voltage circuit;
upper row –
DVC C only,
lower row –
DVC C or D

L2

L2

I

L1

I
S

3) Insulation for
adjacent circuits:

M
L1


S

I

C RC A B M

C RC A B

S
I

C RC A B M
S

S
I

A

L1

M

A

Z
L1

T


AB

L1

M

T

A

L2

M
T

T
L1

L2

F
A

live part

L1

clearance for basic insulation

T


test finger (Clause 12 of
IEC 60529)

B

basic insulation for circuit A

L2

clearance for reinforced insulation

Z

supplementary insulation for
circuit A

B C basic insulation for circuit C

M

conductive part

Z C supplementary insulation for
circuit C

C

adjacent circuit


R

reinforced insulation for circuit A

*

also applies to plastic screws

D

double insulation for circuit A

R C reinforced insulation for circuit C

F

functional insulation for circuit A

I

insulation less than B

S

surface of equipment

NOTE 1: In column c a plastic screw is treated like a metal screw because a user could replace it with a metal screw during
the life of the equipment.
NOTE 2: In row 4), the insertion of the test finger is considered to represent the first fault.
IEC


Figure 5 – Examples for protection against direct contact

1198/07


EN 61800-5-1:2007

– 22 –

Three cases are considered:
Case a): Accessible parts are conductive and are connected to earth by protective bonding.

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•

Basic insulation is required between accessible parts and the live parts. The relevant
voltage is that of the live parts (see Figure 5, cells 1)a), 2)a), 3)a)).

Cases b) and c): Accessible parts are non-conductive (case b)) or conductive but not
connected to earth by protective bonding (case c)). The required insulation is:
•

double or reinforced insulation between accessible parts and live parts of DVC C or D. The
relevant voltage is that of the live parts (see Figure 5, cells 1)b), 1)c), 2)b), 2)c)).

•

supplementary insulation between accessible parts and live parts of circuits of DVC A or B

which are separated by basic insulation from adjacent circuits of DVC C. The relevant
voltage is the highest voltage of the adjacent circuits (see Figure 5, upper cells 3)b), 3)c)).

•

basic insulation between accessible parts and live parts of circuits of DVC B which have
protective separation from adjacent circuits of DVC C or D. The relevant voltage is that of
the live parts (see Figure 5, lower cells 3)b), 3)c)).

4.3.3.3 Protection by means of enclosures and barriers
Live parts of DVC B, C or D shall be arranged in enclosures or located behind enclosures or
barriers, which meet at least the requirements of the Protective Type IPXXB according to 15.1
of IEC 60529. The top surfaces of enclosures or barriers which are accessible when the
equipment is energized shall meet at least the requirements of the Protective Type IP3X with
regard to vertical access only. See 5.2.2.3 for test. It shall only be possible to open enclosures
or remove barriers with the use of a tool or after de-energization of these live parts.

ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ

Where the enclosure is required to be opened and the PDS energised during installation or
maintenance:
a) accessible live parts of DVC B, C or D shall be protected to at least IPXXA;

b) live parts of DVC B, C or D that are likely to be touched when making adjustments shall be
protected to at least IPXXB;
c) it shall be ensured that persons are aware that live parts of DVC B, C or D are accessible.
Open type sub-assemblies and devices do not require protective measures against direct
contact.
Products containing circuits of DVC A, B or C, intended for installation in closed electrical
operating areas, as defined in 3.5, need not have protective measures against direct contact.

Products containing circuits of DVC D, intended for installation within a closed electrical
operating area, have additional requirements (see 4.3.12).


– 23 –

4.3.4

EN 61800-5-1:2007

Protection in case of direct contact

4.3.4.1 General

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Protection in case of direct contact is required to ensure that contact with live parts does not
produce a shock hazard.
The protection against direct contact according to 4.3.3 is not required if the circuit contacted is
separated from all other circuits according to 4.3.1.3, and:
•

is of DVC A and complies with 4.3.4.2,
or

•

is current limited via a protective impedance according to 4.3.4.3,
or


•

is limited in voltage according to 4.3.4.4.

See Annex A for examples of these measures.
NOTE The requirements of these subclauses apply to the entire circuit including power supplies and any
associated peripheral devices.

Compliance with protective separation requirements shall be verified according to 5.2.1, 5.2.2,
and 5.2.3 as appropriate.
4.3.4.2 Protection using DVC A

ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ

Unearthed circuits of DVC A, and earthed circuits of DVC A used within a zone of equipotential
bonding (see 3.44), do not require protection in case of direct contact.

Earthed circuits of DVC A that are not within a zone of equipotential bonding require additional
protection in case of direct contact, by one of the measures given in 4.3.4.3 or 4.3.4.4, in order
to provide protection in cases where the earth reference potentials of the DVC A circuits are
not the same. The instruction manual shall provide information concerning the use of these
circuits (see 6.3.6.5).
4.3.4.3 Protection by means of protective impedance
The connection of accessible live parts to circuits of DVC B, C or D, or to earthed circuits of
DVC A not used within a zone of equipotential bonding, shall only be made through protective
impedances (unless 4.3.4.4 applies).
The same constructional provisions as those for protective separation shall be applied for the
construction and arrangement of a protective impedance. The current value stated below shall
not be exceeded in the event of failure of a single component. The stored charge available
between simultaneously accessible parts protected by the protective impedance shall not

exceed 50 μC.
The protective impedances shall be designed so that the current available through them to
earth at the accessible live part does not exceed a value of 3,5 mA a.c. or 10 mA d.c. See
5.2.3.4 for test.
The protective impedances shall be designed and tested to withstand the impulse voltages and
temporary overvoltages for the circuits to which they are connected. See 5.2.3.1 and 5.2.3.2 for
tests.